Diodes Incorporated DDTA143ZKA-7-F

Overview

DDTA143ZKA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SC-59 package with R1 = 4.7 kΩ, R2 = 47 kΩ, −50 V V_CEO, −100 mA I_C(max), and 200 mW P_D, designed for digital switching in logic-level interface circuits such as microcontroller GPIO drivers and level-shifting inputs.

For engineers reviewing the DDTA143ZKA-7-F datasheet, DDTA143ZKA-7-F pinout, DDTA143ZKA-7-F application, or DDTA143ZKA-7-F equivalent, key selection criteria include verified input voltage thresholds (V_IN(on) = −2.5 V @ I_O = −20 mA), guaranteed DC current gain (G_I = −80), output saturation voltage (V_O(on) = −0.3 V), and built-in resistor tolerance (±30% R1, ±20% R2/R1 ratio).

Technical Context

This device integrates two discrete biasing resistors (R1 ≠ R2) directly into a PNP epitaxial planar transistor die, eliminating external base resistors in digital switch configurations. Its fixed R1–R2 network sets predictable turn-on/off thresholds and ensures stable switching behavior across temperature (−55°C to +150°C).

The SC-59 surface-mount package supports high-density PCB layouts with UL 94V-0 flammability rating and moisture sensitivity level 1. Electrical performance is specified under standardized test conditions: V_CC = −50 V, I_O = −20 mA, V_O = −0.3 V, and T_A = 25°C.

Key Specifications

Pinout & Package

Package: SC-59 - Surface-mount plastic case (UL 94V-0), 0.008 g weight, lead-free matte tin plating, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP pre-biased transistor applications.

Compared with DDTA143FKA-7-F, DDTA143ZKA-7-F provides lower input threshold and higher output current capability; compared with DDTC143ZCA-7-F, it enables high-side sourcing rather than low-side sinking, simplifying power rail control in isolated domains.

Availability

DDTA143ZKA-7-F is available at Aetrix Electronics and suitable for microcontroller GPIO drivers, level-shifting interfaces, industrial sensor load switches, and power sequencing controls requiring stable component supply and RoHS-compliant packaging.

Supply support for DDTA143ZKA-7-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The DDTA series belongs to Diodes' pre-biased transistor product line, engineered specifically for reducing component count and improving reliability in digital interface and switching applications across consumer, industrial, and automotive electronics.

FAQ

What is the maximum operating temperature for DDTA143ZKA-7-F?

The device operates across −55°C to +150°C junction and storage temperature range. Thermal resistance R_θJA is 625°C/W on FR4 board with recommended pad layout; derating begins above 25°C ambient per Figure 1 in DS30342 Rev. 7-2.

Can DDTA143ZKA-7-F replace a standard PNP transistor with external resistors?

Yes - its integrated R1 = 4.7 kΩ and R2 = 47 kΩ eliminate two external resistors. Pinout matches SC-59 (E/C/B), and electrical behavior replicates discrete implementations with verified V_IN(on), G_I, and V_O(on) specs under identical test conditions.

Is DDTA143ZKA-7-F lead-free and RoHS compliant?

Yes - it uses matte tin-plated copper leadframe and green molding compound compliant with RoHS Directive 2011/65/EU and J-STD-020C Level 1 moisture sensitivity. No intentionally added lead; halogen-free per Diodes' Green Policy (Date Code 0627 and newer).

What is the typical input leakage current when the device is off?

IO(off) is −0.5 μA maximum at V_CC = −50 V and V_I = 0 V. This ultra-low leakage ensures minimal standby power draw in always-on industrial sensor nodes and battery-backed systems.